AI analysis
CVE-2026-76464 tracks multiple buffer-management flaws in Cisco networking software, grouped under CWE-119 (improper restriction of operations within the bounds of a memory buffer). Cisco found the issues in an internal security review and fixed them in a software hardening release; the public write-up does not describe a specific trigger. Per CVSS 3.1 (9.6), an adjacent-network attacker can exploit them with low complexity, no privileges, and no user interaction, with changed scope and high impact to confidentiality, integrity, and availability. The advisory text does not name individual product lines or version ranges, so the exact installed base cannot be determined from this data. No public proof of concept is known and the CVE is not in CISA KEV.
What to do: Install the Cisco software hardening release that addresses CVE-2026-76464 on the networking products you run, using the official PSIRT advisory to identify the exact images. Prioritize devices reachable from adjacent networks, because the issue needs no privileges or user interaction. Until the update is applied, restrict adjacent-network access to those systems.
Estimated exposure
—No basis for an estimate.
Order-of-magnitude estimate by the model from install counts, market share and public scan data it knows; verify before quoting.
Description
As part of Cisco's ongoing commitment to proactive security and product quality, the Cisco networking engineering team has conducted a comprehensive internal security review. This review resulted in a software hardening release that addresses multiple internally discovered vulnerabilities. The vulnerabilities tracked by this CVE-2026-76464 are related to buffer management issues that are grouped under the Common Weakness Enumeration (CWE) CWE-119.